7
3 1 4
0 0
2 2
4 0
5 1 4
0 0
1 2
0 3
4 3
3 1
4 1 1
0 0
0 1
1 1
1 0
4 3 10
0 0
1 9
10 10
10 0
4 5 10
0 0
1 9
10 10
10 0
7 2 10
0 0
10 2
6 3
9 6
5 9
6 5
2 8
7 5 10
0 0
10 2
6 3
9 6
5 9
6 5
2 8